feat(vex): fix failing tests

Author: JigyasuRajput

cve_bin_tool/util.py

@@ -444,9 +444,9 @@ def decode_bom_ref(ref: str):
             cdx_bom_ref = urn_dict["bom_ref"]
             try:
                 # Try splitting by dash first, then by colon
-                if '-' in cdx_bom_ref:
+                if "-" in cdx_bom_ref:
                     product, version = cdx_bom_ref.rsplit("-", 1)
-                elif '@' in cdx_bom_ref:
+                elif "@" in cdx_bom_ref:
                     product, version = cdx_bom_ref.rsplit("@", 1)
                 else:
                     product, version = None, None